| Parameter | Reference value |
| Er3 ion concentration NER | 5.14 × 1025 m−3 |
| Yb3 ion concentration NYb | 6.20 × 1026 m−3 |
| Yb3 absorption cross section σ56 | 0.14 × 10−25 m2 |
| Yb3 absorption cross section σ65 | 2.82 × 10−25 m2 |
| Er3 ion concentration σ12 | 4.82 × 10−25 m2 |